Removable stripper appliance



S pt. 4, 19.28. 1,683,501 I M. E. TOBELER' REMOVABLE STRIPPER APPLIANCE Filed Oct. 2 1927 1 N VEN TOR.

M6126 Emil Tozeler;

ATTORNEY.

Patented Sept. '4, 1928.

UNITED 4 STATES PATENT OFFICE,

m mnn'ronnnnn, or DETROIT, nrcnren'n.

nmtovABLE sramrna nrrnumcn.

Application filed 0mm 27,1927. Serial :10. 29,143. v,

This invention relates to a removable strip per appliance for die presses.

hole of the stripper plate, makin it ncessary when cutting edges become ull to re move the die out of the press for grinding, and to overcome "the die removal it is one of the objects of this invention and to this 1 end the invention'resides, in providing in a manner as. hereinafter set forth, means whereby it ispossible to remove the stripper plates from the die when the upper part of the die is held in an elevated position by the ram of the press, and after the removal of the stripper the d1e can be ground easily. v

A further object of the invention is to provide, in amanner ashe'reinafterset'forth, means to eliminate the employment of a gauge for holding the sheet metalin position for cutting and with' -said means forming a part of the removable stripper appliance.

'Further objects of the invention are to pro-- vide, in a manner as hereinafter set forth, I a removable stripper appliance for the purpose referred to which is simple in its construction andarrangement, strong, durable, compact, readily installed, thoroughly efiicient in its use, permitting of the convenient removal of the stripper plates when desired to grind the dies, and comparatively inexpensive to set up.

With th foregoing and other objects in view the invention consists of the novel con-,

struction, combination and arrangement of .parts as hereinafter more specifically described, and illustrated in the. accompanying drawings, wherein is shown an embodiment .of the inventionyhut itisjo be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended. v

I In the drawings wherein like reference characters denote corresponding parts throughoutvthe several views:

Figure 1 is V of a press showing the adaptation therewith of a removable simippler appliance for the,

4 male and female dies t ereo Figure 2 is a perspective Viewof the coupling memberof a stripper plate of the male die. 1 1

Figure 3 is a perspective view of the coua fragmentary view in section pling member for the stripper plate of the female die. thefpractice to se- ,Figure 4 is a section on line Figure 1.-

Referring to the drawings in detail 'l de notes the stationary element and 2 the shiftable element of a die press and the former has 'coupledtherewith a guide pin- 3 for the 'shiftable elemem 2 and said guide pin 3 travels in a guide opening 4: formed in the shiftable element 2. -A coupling means for the gulde' pm 3 is indicated at 5 and which is carried by the stationary element 1.' The male die of' the press is indicated at 6 and is connected tol the shiftable element 2. Thefemale die of the press is indicated at. 7 and which is carried by the stationary element 2; vI-loldfast devices 8 are employed forfixedly securing the dies 6 and 7 in position.

The die 6 includes a reduced portion 9 whereby a part of the ,lower face thereof will be positioned in a plane above the remaining portion of said lower face and that part of the lower face of the die 6 hich' is positioned above the remaining part of said lower face i is indicated at 16 and provides an abutment.

The stripper plate for the die 6 is indicated at 11 and it is formed" with an inverted conical shaped opening 12. The stripper plate for the die 7 is indicated at 13' and is formed with a conoidal shaped opening 14.

.The stripper plate 11 is connected to the stationary element 1 by a coupling'member, referred to generally at 15, in connection with a retaining nut 16 of the non-rotative type. Thecoupling member 15 includes a cylindrical shank 17 provided at its lower end with peripheral threads 18 and formed at its upper end with an inverted conical shaped head 19 terminating'in a 'cyhndrical extension 20 formed with a polygonal shaped socket 21. The'he'ad 19 seats in the opening 12 of the plate 11 and the extension 20 is positioned above the plate 11 and is of a diamv eter corresponding to the greatest diameter of the head 19. The extension 20 coactswith the raised portion 10 of the lower face of the die 6 for the purpose of lowering the plate 11. The element 1 is formed with a 'socket' 22 which opens at the upper face of said element 1, and arranged below and spaced-from the socket 22 is a' socket. 23 which is also formed in the element 1 and opens at the lower face thereof. The socket 23 is closed by a counter-sunkplate 24 secured in the lower face of the element 1. Communication is-established betweenthe sockets 22 and 23 bit a cylindrical opening provided:in-the -e ement 1.; The non-rotative nut 16'is arranged in socket 23. The shank or stem 17 extends through socket 22 and into socket 23; as well 'as' plassing' through opening 25; ranged wit in socket 22 and interposed be,-

tween thebot tom thereof andlthe'lower face" (11 7 ,ofgthe'plate-ll; as well assurrounding the V '10 i'stem or shank 17 is a coiled controlling spring 26 for the plate 11 and the diameter of the spring 26 is'substantially the same as the di- 3 ameter of the-socket 22. 'Theinon-rotative y'nut 16 is mounted on the threaded lower ter Ininal portion of the shank or stem 17, and the latter projectsrbelow said nut 16' when the coupling member is employed to connect the plate 11 with the stationary element '1.- An

. form of-non-rotative nut canrbe employed:

20 but by way of example the'nut 16 consists of abodyportion-27in the form-ofan annulus prov ded with diametrically disposed cars 28 travellingiii/grooves 29 ofiset; from the wall. of the socket and diametrically 'opposed The ears28 travelling in the grooves 29-prevent the nut 16 rotating relative to-the stem or shank- 17 .l \Arran'gedwwithin the f socketf 23 and interposedbetween the nut 16 'angl thejplate 24 fisa "coiled controlling spring 30 'acting'as ayposi tioning spring ,for vt e nut .16i-or for th nut 16 'eleva 'psition when the'nut; r y fi e tm 8 f -v9111315111 16 61 6 2 .yi'wo pl n e b rre if dto .a stem or shank-33, having peripheral 34 at one end and at itsot f er end formedgwith a oonoidal-shaped head 135' 'formed; it polygonal; shaped socket-'36. The head 35 is I mithe ogjning l i andtheshank'or exteni' f througli. an -opemng' 37' .I formedfin the element 2 and into .-a"socket 38 which is formed into and opens atthe upper "face-oi said: element .Thefxnut 32 p is 1' mountedon'i'thethreaded portion; 34 of the 1 orshank; Interposed between "the j Iement-Z id t plate-"13 nd ur ng -'-.the; s'hank or stem'fifiisa'coiled controlling spring 139. The-socket 38;185010l8ed by 'a 'pla'te 1 1 l f h i i fitia 1 8. i, 9 sa e ohtm i a hwn fiand 'se lint '32. i dfi di et e 41,- elin a. diametrically die. posedwith to the wall of 'the A combined-poeitloning 'and cushioningsheet metal "for cutting. The spring 39 funcagainst thecylindrical extension 20 forming whereby the stri plates 11 and 13' can be the urpose of maintaining ani hewr "40 oountersunkjin'theto of the'f'elementg; 7

latter to a alsuitable tool so thatt's'a'id The Y cylindrical extension '20 is; employed of the ordinary gauge for positioning m tions to retain'fthe plate13 at, the desired position -to associate with the female or lower e- I en the material is' properly rested a part of the coupling member 15, and on the downward stroke of element 2, the portion;

10 of the lower face of the male or upper die 6 will first'engage the extension 20 and on-a: further downward movement oi theeIement 2, the member15 and platel'l will be shifted downwardly to the position shownin Figure, 1. The plate 13 is carriedinsetpositiondownwardl when the element 2 moves'in such direction. On the complete downward stroke of the element 2, the stripper plates'll 'and'13 will be in the position as shownrin Figure ,1,- relatively' to each other;

,' Whenthe cutting edges become Y 1511 it 5 .bers 15 and 31 :can be convenient yremoved i from connection-with thenuts'16 and 5 32' removed and {t edies sharpened without 4 detaching themfromtheir fixed position: 1 A- punching is carried by th'e L elements 1 and '25fa'nd indicated at'fl-with respect to element land at to" m nw- 1.1m 1m 1 P ded wit opening deforsuch It is thought removable strip ap hancehin accordance: with this invent on an -forw.the set; forth can beare'adilyrunde' invention is asillustrated andfdescrihed, it is tobe understood that changes in the r 6; V, tailsof-eonstruction be had whifih j within the scopeof the iniventioir WhatI-'claimis:-" r i 1. Aremovable'stri per'a pliance ior dies 6- w prisingathread coup memhervfor 118 extension througha 'strip and prm ."videdat one-end with a the plate," :a non-rotative nut eonn .to 'the 7 other end of said member for the pt 1 die Pmri ig' a' positioning "-;for js'aid-nut. r

. me 1 e p n ei rd i-m 1 1 T ar .extenn omhm r p 7 hud r "videdat'oneien plate,- a r-non-fiitativenut' o'o V v a 1 j. vi though the preferred embodiment 0f the assa lant latter to a part of a die press in alignment with the die, a stripper plate controlling sprin surrounding said member and adapted to ear a ainst the plate, and an extension projecting om saidahead and adapted to be engaged y the die on its downward movement whereby the plate and coupling member will be shifted downwardly in'unison against the action of the controllmg spring.

3 A removable strip er appliance for dies comprising a threa ed coupling member for extension through a stripperplate and provided at one end with a head engaging the plate, a non-rotative nut connected to-the other end of said member for connecting the latter'to a part of a die press in alignment with the die, a stripper plate controlling spring surrounding said member and adapted to bear against the plate, a positioning spring for said nut, and an extension rejecting upwardlyfrom said head and a pter to be enaction of said controlling spring.

gaged whereby on the downward movement thereof the plate and coupling member will be shifted downwardly in unison against the 4. A removable stripper appliance for dies comprising in combination, a stripper plate formed with a conoidal shaped opening, a

threadedcoupling member extending through said plate and rovided at one end with a conoidal shape head seating in said opening, a non-rot'ative nut connected to the other end of'said member :for connecting the latter to a part of a die press in alignment with'the die, a controlling spring surrounding said member and hearing against said plate, and a positioning s ring for said nut.

5. A remove. 1e stripper appliance for dies comprising incombination, a stripper plate formed with a conoidal shaped opening, a threaded coupling member extending through said plate and rovided atone end with a conoidal shaped ead seatin in said opening, a non-rotative nut connecte to the other end of said member for connecting the latter to a part of a die press in alignmentwith the die', a controlling spring surrounding said member and hearing against said plate, and an extension projectmg upwardly from said head and adapted to be impacted .upon by a die on the downward movement thereof whereby said late and coupling member will be mov r downwardly in unison against the action of said controllin spring.

In testimony whereof, I hereto.

aflix my signature MAX EMIL TOBELER. 

